The Ceton InfiniTV 4 PCIe was the world"s first 4-tuner digital cable TV tuner for the PC. InfiniTV turns your PC into the ultimate set-top box and DVR. With InfiniTV on your PC, you can replace your cable set-top box and associated monthly lease and DVR fees and use Windows 7"s built-in Media Center functionality to watch and record 4 live cable TV channels at once, including HD and premium channels like HBO, Showtime and Starz! InfiniTV 4 PCIe is an internal device in the PCI Express (PCIe) form factor. If you"re looking for an external device with the same capabilities, check out the Ceton InfiniTV 4 USB model.When used with Media Center Extenders like the Xbox 360, you can also stream live or recorded cable channels to other TVs in your home over your home network. Using only a single cable connection and single CableCARD from your cable operator, InfiniTV can deliver all your cable channels and full DVR capability on any TV set. Requires a compatible PC with Windows 7 Home Premium, Windows 7 Professional, or Windows 7 Ultimate and an available PCIe slot. Requires a cable TV subscription and CableCARD from your cable operator. Media Center Extender(s) required to access cable channels and recordings on secondary TV sets.